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  #1  
Old 06-04-2018, 11:03 AM
adol290 adol290 is offline
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Default PMC MB2i SE - Bi-amp or Single amp

I have a pair of PMC MB2 SE on order.

I am trying to decide whether to use a single Bryston 28b3 on each speaker.
The 28b3 has dual binding posts, so one cable to the bass, and one cable
to the Mid/tweeters.

Or do a 7b3 on the bass and a 4B3 bridged on the midrange/tweeter.

I already have the 7b3's and 4b3 to do the bi-amp.

Has anyone tried bi-amping vs single.
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  #2  
Old 06-05-2018, 07:48 AM
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essjay essjay is offline
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single 28's with biwire.
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Old 06-29-2018, 07:56 AM
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Pyro Pyro is offline
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Single Amp to Single Cable to binding posts on Speakers here.
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TV&Movies PMC EB1i(2), CB1i, OB1i(2). SVS Ultra16(2). McIntosh MC207. Bryston SP4.
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Old 06-29-2018, 08:00 AM
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Why don't you try the 7b3s first and hear if that's enough? Adding the 4b3 you will need an active crossover as well.
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2CH Room PMC MB2se(2). JL Audio F113(2). McIntosh C1000C/T, MC2301(2). PS Audio Directstream DSD, PowerPlant 20. Clearaudio Ovation/Magnify/Stradivariv2. Misc: Wireworld Cables and Interconnects. Stillpoints Ultra 5, Ultra SS. GIK Acoustics Bass Traps. DIY Computer Audio Transport. Racks. Adona.
TV&Movies PMC EB1i(2), CB1i, OB1i(2). SVS Ultra16(2). McIntosh MC207. Bryston SP4.

Last edited by Pyro; 08-23-2018 at 05:30 AM.
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  #5  
Old 08-11-2018, 12:34 PM
adol290 adol290 is offline
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Well i am still waiting on the speakers, but good comments here.

I will try the 7b3's first.

And just for fun, i am going to run a splitter on my interconnects(no crossover) and try the 7b3's on the woofers and the 4b3's(in bridged mode) on the mids, with a jumper to the tweeters. Too bad i don't have a crossover to try.


BTW has anyone heard of any Board or electronic issues with the MB2 SE.

Just curious because i had a pair of Ib2i actives and had a number of issues
with the boards.

I also have a friend who has the Fact 12's and he had to send his speakers back for service due to electronic issues.

Just don't want that type of surprise again.
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Old 08-11-2018, 04:13 PM
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What taps off your amps will you be using when bi-amping?
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2CH Room PMC MB2se(2). JL Audio F113(2). McIntosh C1000C/T, MC2301(2). PS Audio Directstream DSD, PowerPlant 20. Clearaudio Ovation/Magnify/Stradivariv2. Misc: Wireworld Cables and Interconnects. Stillpoints Ultra 5, Ultra SS. GIK Acoustics Bass Traps. DIY Computer Audio Transport. Racks. Adona.
TV&Movies PMC EB1i(2), CB1i, OB1i(2). SVS Ultra16(2). McIntosh MC207. Bryston SP4.
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  #7  
Old 08-11-2018, 05:31 PM
adol290 adol290 is offline
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Quote:
Originally Posted by Pyro View Post
What taps off your amps will you be using when bi-amping?
Not sure if i understand your question.

The MB2's are 4 ohm. There is no selection on the bryston amps for 8 or 4 ohm.
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Old 08-12-2018, 03:54 AM
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Quote:
Originally Posted by adol290 View Post
Not sure if i understand your question.

The MB2's are 4 ohm. There is no selection on the bryston amps for 8 or 4 ohm.
My bad, I was unaware your amps do not have the ability to select the different impedance levels manually to match the speakers connected to them.

From the PMC manual, impedance for MB2SE is 8 ohms.

This is what I was asking.

Single Amp > HF_MF_LF = Impedance of 8 Ohms
Bi-Amp 1st Amp > LF = Impedance of ?
Bi-Amp 2nd Amp > MF_HF = Impedance of ?

I don't know the answer, that is why I am asking. It seems to me that you would have different impedance ratings when all three drivers (HF_MF_LF) are connected vs. two drivers connected (HF_MF) and one driver (LF) individually connected.

I sent an inquiry to my dealer.
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2CH Room PMC MB2se(2). JL Audio F113(2). McIntosh C1000C/T, MC2301(2). PS Audio Directstream DSD, PowerPlant 20. Clearaudio Ovation/Magnify/Stradivariv2. Misc: Wireworld Cables and Interconnects. Stillpoints Ultra 5, Ultra SS. GIK Acoustics Bass Traps. DIY Computer Audio Transport. Racks. Adona.
TV&Movies PMC EB1i(2), CB1i, OB1i(2). SVS Ultra16(2). McIntosh MC207. Bryston SP4.

Last edited by Pyro; 08-12-2018 at 06:57 AM.
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  #9  
Old 08-12-2018, 09:58 AM
adol290 adol290 is offline
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Quote:
Originally Posted by Pyro View Post
It seems to me that you would have different impedance ratings when all three drivers (HF_MF_LF) are connected vs. two drivers connected (HF_MF) and one driver (LF) individually connected.

I sent an inquiry to my dealer.
Please post the results when you get them.
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  #10  
Old 08-11-2018, 06:48 PM
Folkman Folkman is offline
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I think you will find the MB2se are 8 ohm.
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